Roof drain



May 19, 1942.

E. W. N. BOOSEY ROOF' DRAIN Filed March l5, 1941 l2 4 fww.

E WM M ,m .f s. B,

Patented May 19, 1942 arance Unirse s'rg'rss earner orifice nooF DRAINEdward W. N. Boosey, Detroit, Mich. Application March 15, 1941, serialNo. 383,515

5v Claims. (C

This invention relates to rcof drains, the object being to provide adrain for a substantially fiat roof of such construction that a sheet ofwater will tend to be maintained on the roof in the summer time toprotect the roonng material from disintegration from the eifects of thehot sun and with which is provided a means for preventing the retainingof Va sheet of water on the roof.

Ordinary flat roofs are usually covered with a sheet material togetherwith tar and/or gravel and the hot sun tends to destroy it by causingthe tar to ow and causing the edges of the sheets to turn upwardly whicheventually provide for ingress of water to the building. If acoinparatively thin film or sheet `of water is maintained on the roof inthe summer time which may be replenished from time to time,disintegration by heat of the sun will be prevented at least to a majordegree and such sheet of water maintained on the roof lis to aconsiderable degree preventive of the transfer of heat through the roofto the interior of the building.

A further object and feature of the invention is to provide a roof drainof a character to maintain a sheet of water on a r-oof that is of simpleand inexpensive construction and useable in the summer period for thesaid purpose of maintaining water on the roof and adapted by removal ofa convenient portion thereof to prevent accumulation of water on theroof as would be desirabler during the winter period in order to preventan accumulation of ice.

These and other objects and various novel features of the invention arehereinafter more fully described and claimed, and the preferredcharacter of construction of a roof drain embodying my invention isshown in the accompanying drawing in which-v Fig. 1 is a section in planview taken on line I-I of Fig, 2.

Fig. 2 is a vertical section taken on line 2 2 of Fig. 1.

A roof drain in accordance with my invention is provided with a mainbody I having side walls tapered at the bottom and terminating in acylindrical lower end 2 adapted for connection of a conduit therewithindicated by dotted lines 3 which may be caulked in place. The body ofthe drain has at its open upper end a peripheral outer flange over whichthevroof material or hashing 5 may be laid. The roof material has acentral aperture f5 of a diameter approximately the same as the innerdiameter of the upper end of the drain body. The flange 4 is preferablyprovided with a circular recess I to receive a sealing material and overwhich the roof flashing 5 may extend. The flashingissecured in place bya head 8 vwhich is provided at its lower end with a peripheral flange 9having a rib I in its lower surface aligning with the recess 'I of thebody and forcing the roof hashing vdownwardly thereinto torsealthe'iiashing to the body flange 4. 4The head 8 is secured in place bymeans of cap Screws II which extend through the flange 9 of the headinto the flange I of the body thereby clamping the roofing in; place.

A featured this invention is in the character of the head. It is. of atubular material having an upstanding wall I2 providing a drainsubstantially circular in form throughout the greater part of itsperiphery and on one side is formed with the re-entrant portion I3 asshown more clearly in Fig. 1. At this re-entrant portion the baseextends inwardly of the flange 9 forming a Aflat surfacesubstantially'on ythe same level as the roof flashing `5 and within there-entrant the yupper end of the member I2 from the roof -Y flashing issunicient toprovide a desired depth of water on the roof in areasVbeyond the depres- 1 sion (if any) in which the roof drain may bepositioned. Preferably also', to prevent an accu- `mulation of debris onor about the head, I provide aV slotted cover member I5 which has abottom flange I6 resting on the flange 9 of the head and secured theretoas by screws Il. The grat'- ing member I5 extends above the upper end.of Y

the tubular portion I2 of the head and is also apertured at its top asindicated at I8. The grating member thus shields the drain head as wellas the plugged aperture from an accumulation of material that mightotherwise pass down into the head or accumulate over the pluggedaperture and choke the flow therethrough.

With this arrangement of parts, I provide a means for maintaining waterto certain depth on a roof, any excess water readily flowing Vover thetop of the tubular portion I2 of the head and thence to the outlet andfurther, whensuch 4accumulation of Water is not desired, as forlinstance in winter time, the plug Iii is removed and thus all the watermay drain from the roof.

The height of the dam I2 may be varied, depending yupon the depth of thewater required to be retained on the roof and the plugged aperture I4 isat the level of the flashing to prevent any retention of water from thedrain head. The plug I4 may be of brass and the threaded ferrule I Iamay be inserted in the iron casting and a pin Mb inserted to preventrotation thereof. By use of such brass plug and brass ring 14a, therusting of the plug in place is prevented, and also the threads toreceive the plug do not disintegratel as would be the case if theremov-V able plug were threaded directly in the threaded opening in thecast iron member.

The essential feature of the invention resides in the provision of a damwhich is of a height to determine the desired water level and waterrising above the determined level flows over the top of the dam I2through the head to the outlet. The plug I4 has a socket in its upperface and a wrench having an end to iit the socket may be introducedvertically downward through an opening in the top of the grating topermit the plug to be removed or screwed back to place without necessityof removal of the grating member I5. I

From the foregoing description, it is believed evident that the variousfeatures and objects of the invention are attained by the structuredescribed; that it is simple and inexpensive in construction, and thatvarious changes may be made in the structure without departing from thespirit and scope of the invention as set forth in the appended claims.

Having thus briefly described my invention, its utility and modeofoperation, what I claim and desire to secure by Letters Patent of theUnited States is:

1. A roof drain comprising a body member having an open upper end and aperipheral flange thereabout and an opening at the bottom for receptionof a conduit, a head having a flange adapted to be mounted on the bodyflange, a roof flashing secured between the said flanges, said headhaving' an integral vertical tubular portion extending upwardly andhaving an open upper end normally determining the depth of water thatmay accumulate on a roof, and a shield for preventing debris enteringthe body through the tubular portion comprising an apertured* memberenclosing the head.

2. A roof drain comprising a body member having an open upper end and anopening at the bottom for the reception of a conduit, a peripheralflange provided at the upper end of the body, a head having a flangeadapted to be mounted on the body ange for the securing of a roofflashing therebetween, said head having an integral vertical open endedtubular portion extending to above the iiange and providing a dam forretaining water to a deiinite depth about the drain, said flange havingan opening eXteriorally of said tubular portion through which water maycompletely drain from the roof, to said conduit, and means manuallyoperable to open or close said opening.

3. A roof drain comprising a peripherally hanged body member having anopen upper end shaped at the bottom to receive a conduit, a headtherefor including an open ended tubular portion having a peripheralange for mounting on the body flange, said tubular portion having on oneside thereof above the flange a re-entrant portion, said ange of thehead at the said reentrant portion having a threaded opening, a plug forclosing the opening, the height of the tubular portion above the angedetermining the level of water maintained on a roof, and an aperturedshield enclosing the said upper end of the tubular portion and securedto the flange of the head.

4. A roof drain comprising a peripherally anged body member having anopen upper end and shaped at the bottom to receive a conduit,

a drain head constructed to provide a dam and having a peripheral flangefor mounting on-the body iiange, said dam being of a height to maintaina predetermined level of water about the drain head, a roof flashingsecured between the said anges, said head flange having an opening atone side of the dam practically at the roof level through which liquidfrom the roof may drain into the conduit, and a plug for closing theopening whereby the dam is made eiective to maintain a denite waterlevel on the roof, an apertured shield secured to the flange at the edgeand enclosing said dam and the opening in the flange.

5. In a roof, a body member through which liquid may discharge from aroof, a conduit providing for discharge of liquid from the body member,said body member being arranged to provide a dam for maintaining apredetermined level of water on the roof and permitting water tending toaccumulate to a greater depth to flow through the drain head into theconduit, arid means associated Vwith the body member and spaced from thedam operable to provide for discharge of water through the drain head toprevent an accumulation of water on the roof.

EDWARD W. N. BoosEY. n

